Pension Plan and Employee Benefits - Schedule of Current and Non-Current Portions of the Other Benefits Liability (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Defined Benefit Plan Disclosure [Line Items]
Current	$ 3,770	$ 16,344
Non-current	64,226	69,250
Current	13,864	26,439
Non-current	160,675	166,702
Other Benefits Plan
Defined Benefit Plan Disclosure [Line Items]
Current	5,279	5,279
Non-current	38,196	38,724
CLECO POWER
Defined Benefit Plan Disclosure [Line Items]
Current	3,770	16,344
Non-current	64,226	69,250
Current	9,127	21,701
Non-current	103,901	109,464
CLECO POWER | Other Benefits Plan
Defined Benefit Plan Disclosure [Line Items]
Current	4,524	4,524
Non-current	$ 29,628	$ 30,054